33 10... Overview of rear differential/output shafts
WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
Safety precautions & general information. See REAR AXLE FINAL DRIVE: ASSIGNMENT TO MODEL SERIES or LIFTING THE VEHICLE USING A VEHICLE HOIST